🚀 go-pugleaf

Regarding interfaces available in Mac prologs:

LPA and BNR prolog's both give you the ability to do things like
add new menus, and attach goals as event-handlers to menus and
windows (to handle redraw requests, mouse-clicks, etc.).

AAIS and ALS prolog give you the ability to handle the Mac event
loop yourself and call the Mac toolbox.  This lets your program
create and maintain windows, menus, etc., while it is running,
but once your program returns to the top-level, I just don't know 
what these systems do with events for the menus and windows you
have created.

While I haven't spent too much time building user interfaces
with any of these systems (I like to believe I have better
things to do with my time!) I get the feeling that none of
them are as well thought-out and implemented as the
Mac interface provided by MACL Commonlisp system.

All in all, I think that there's room for a lot of improvement
in Prologs for the Mac, and that anyone wanting to see how
event handling and user interfaces (at least on a Mac) are
properly implemented in a higher-level language should study the
MACL implementation very carefully.  As I think ROK says,
"Prolog's different, but it's not that different!".

Mark


Mark Johnson
Institut fuer maschinelle Sprachverarbeitung - Computerlinguistik
Universitaet Stuttgart
Keplerstrasse 17
D-7000 Stuttgart 1
Germany.

phone: 0711 - 121 3132.

On leave until mid July 1991 from:

Cognitive and Linguistic Sciences, Box 1978
Brown University
Providence, RI 02912
USA

email addresses: 

mark@adler.philosophie.uni-stuttgart.de
mj@cs.brown.edu
markj@ai.mit.edu
johnson@csli.stanford.edu
mark@ego.mit.edu
--

Mark Johnson
Institut fuer maschinelle Sprachverarbeitung - Computerlinguistik
Universitaet Stuttgart
Keplerstrasse 17
D-7000 Stuttgart 1
Germany.

phone: 0711 - 121 3132.

On leave until mid July 1991 from:

Cognitive and Linguistic Sciences, Box 1978
Brown University
Providence, RI 02912
USA

email addresses: 

mark@adler.philosophie.uni-stuttgart.de
mj@cs.brown.edu
markj@ai.mit.edu
johnson@csli.stanford.edu
mark@ego.mit.edu